polyvar | polymorphism with value semantics | File Utils library

by badair C++ Version: Current License: Non-SPDX

X-Ray Key Features Code Snippets Community Discussions(4)Vulnerabilities Install Support

kandi X-RAY | polyvar Summary

polyvar is a C++ library typically used in Utilities, File Utils applications. polyvar has no bugs, it has no vulnerabilities and it has low support. However polyvar has a Non-SPDX License. You can download it from GitHub.

polymorphism with value semantics (based on std::variant).

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Support

polyvar has a low active ecosystem.

It has 12 star(s) with 0 fork(s). There are no watchers for this library.

It had no major release in the last 6 months.

There are 2 open issues and 0 have been closed. There are no pull requests.

It has a neutral sentiment in the developer community.

The latest version of polyvar is current.

Quality

polyvar has no bugs reported.

Security

polyvar has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

License

polyvar has a Non-SPDX License.

Non-SPDX licenses can be open source with a non SPDX compliant license, or non open source licenses, and you need to review them closely before use.

Reuse

polyvar releases are not available. You will need to build from source code and install.

Installation instructions are not available. Examples and code snippets are available.

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polyvar Key Features

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polyvar Examples and Code Snippets

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Community Discussions

Trending Discussions on polyvar

In what range does caml_hash_varian return values?

Iterate over terms in Julia's dynamic polynomials

Want to access a class property(field) directly from the object

@polyvar not defined, when using MultivariatePolynomials

QUESTION

In what range does caml_hash_varian return values?

Asked 2020-Jul-23 at 00:19

The subchapter "20.3.6 Polymorphic variants" describes how to identify polymorphic variant value in C (*It contains a mistake: should be caml_hash_variant instead of hash_variant)

I want to use those hash values as error codes in C++ directly. Something like that

archive.mli:

...

ANSWER

Answered 2020-Jul-23 at 00:19

Immediate values in the usual OCaml implementation have the low bit set, and the variant hash is an immediate value. So if you're looking at variant hash values in C++ you can be sure that the value 0 will never be returned by caml_hash_variant.

If you look at the code, the final value is generated either by Val_int() or Val_long(). In the definitions of these macros you'll see that they guarantee that the low bit is set.

I haven't done any kind of analysis of the code, but the value -1 is at least superficially possible as a hash value, since its low bit is set.

Update

The low bit is set on immediate values as a marker for the garbage collector. So it's a convention that must be followed strictly. (IMHO it's one of many really nice design tradeoffs in the OCaml implementation.)

Source https://stackoverflow.com/questions/63044297

QUESTION

Iterate over terms in Julia's dynamic polynomials

Asked 2018-Aug-02 at 10:15

In Julia, I've defined a polynomial using DynamicPolynomials, e.g.:

...

ANSWER

Answered 2018-Aug-02 at 10:15

I guess you can do it directly. Here is an example:

Source https://stackoverflow.com/questions/51632133

QUESTION

Want to access a class property(field) directly from the object

Asked 2018-Jul-29 at 22:04

I've written a class that I want to use as a global data interface for interacting with data coming in from a web-based API. As such, the class is able to take in a value of virtually any base-type and work as if it was that base-type.

Under the hood I store the "value" of the object as a string, and, for the most part, the class acts as a clone of the String object, except that it can try to impersonate any other base class in-context.

This is all kind of superfluous though, my problem / question is, how can I make it so that fields of this type are able to interact with it directly instead of through an Accessor?

For Example:

...

ANSWER

Answered 2018-Jul-28 at 19:17

Modify your PolyVar class so that it overrides the ToString() method:

Source https://stackoverflow.com/questions/51574295

QUESTION

@polyvar not defined, when using MultivariatePolynomials

Asked 2017-Sep-07 at 18:10

When trying to compile the code below (Which is from here), I am told " @polyvar is not defined". I am using Julia v.0.6

...

ANSWER

Answered 2017-Sep-07 at 18:10

There may have been recent changes in the package, and now it seems @polyvar is defined in TypedPolynomials package, and MultivariatePolynomials defines a common interface for which TypedPolynomials is an implementation. So,

Source https://stackoverflow.com/questions/46078265

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install polyvar

You can download it from GitHub.

Support

For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .

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